CN218628737U - Test system for measuring loosening torque between stator and shell - Google Patents

Abstract

The utility model provides a measure test system of not hard up moment of torsion between stator and the stator casing, including casing fixing device and test fixture, at least partly insert arrange in the centre bore of stator in, test fixture includes: a drive member; the supporting moving piece is driven by the driving piece to move between a release position and a working position along the central axis direction of the stator; and a plurality of radial sliders arranged around the supporting moving member, the radial sliders being driven by the supporting moving member and moving outward in a radial direction of the stator to abut against an inner wall of the stator when the supporting moving member moves from the release position to the working position. The design that radial sliding parts can move along the radial direction can be used for fixing the radial sliding parts on the inner wall of the stator without using an adhesive and measuring the torque applied to the radial sliding parts, so that a test sample cannot be damaged and can be recycled, and a test system can measure stators and stator shells with different sizes, so that the use flexibility is improved.

Description

Test system for measuring loosening torque between stator and shell

Technical Field

The present disclosure relates to a test system, and more particularly, to a test system for measuring a loosening torque between a stator and a housing.

Background

The electric machine is a core component of a vehicle, and performance and reliability thereof are critical to the vehicle. An electric machine generally includes a housing, and a stator and a rotor located within the housing. In one type of motor, the stator is disposed around the rotor, in which case the stator and the housing are typically an interference fit, and the strength of the fit between the two is an important parameter in ensuring motor performance and reliability. If the matching strength between the stator and the shell is low, the stator can rotate along with the rotor in the rotating process of the rotor, so that the motor fails. In order to avoid this, designers often measure the loosening torque between the stator and the housing, i.e., the torque when relative movement occurs between the stator and the housing, so as to know the strength of the fit between the stator and the housing, which helps the designers to determine a reasonable fit tolerance between the stator and the housing.

In the existing measurement scheme, a special adhesive is generally adopted to bond the stator and the rotor into a whole, then torque is gradually applied to the rotor until the stator rotates relative to the shell, the applied torque is recorded, and the torque is compared with the maximum torque borne by the rotor in motor calibration parameters to judge whether the matching between the stator and the shell is qualified or not.

However, the above test is a destructive test, and the use of the adhesive causes the test sample to be unable to be reused, which results in waste of resources, and the test also requires special testing personnel to be performed in a laboratory, which is costly and expensive.

Accordingly, those skilled in the art have endeavored to develop a new test system that addresses the above-identified deficiencies of the prior art.

SUMMERY OF THE UTILITY MODEL

The purpose of the present disclosure is to provide a test system for measuring a loosening torque between a stator and a housing, which can conveniently and quickly measure the loosening torque between the stator and the stator housing without using an adhesive, wherein test samples (the stator and the stator housing) can be repeatedly used without special test personnel and special laboratories, the test cost is low, and the test system can also measure stators and stator housings with different sizes, so that the use flexibility is improved.

The present disclosure provides a test system for measuring a loosening torque between a stator and a stator housing, comprising: a housing fixing device for fixing the stator housing; and a test fixture at least partially inserted into the central hole of the stator, the test fixture comprising: a drive member; a supporting moving member driven by the driving member to move between a release position and a working position in a central axis direction of the stator; and a plurality of radial sliders arranged around the supporting mover, the radial sliders being driven by the supporting mover and moving outward in a radial direction of the stator to abut against an inner wall of the center hole of the stator when the supporting mover moves from the release position to the working position.

The design that radial sliding parts can move along the radial direction can enable the testing tool to be fixed on the inner wall of the stator under the condition that no adhesive is used, and torque is applied to the testing tool for measurement, so that the testing tool cannot damage a testing sample, the testing sample can be repeatedly utilized, the waste of resources is reduced, a testing system can be used for measuring stators with different sizes and stator shells of the stators, and the use flexibility is improved

In one or more embodiments, the radial slide includes along the main part of the central axis direction extension of stator and certainly the main part orientation the installation department that the central axis extends, wherein test fixture still includes the location guide, the location guide with the installation department of radial slide is followed radial direction sliding connection.

In one or more embodiments, the positioning guide includes a plurality of receiving grooves that are opened radially outward and receive the mounting portion, and a plurality of positioning through holes, and the mounting portion of the radial slider is provided with a first radial guide groove, wherein the positioning guide further includes a positioning pin that is inserted into the positioning through hole and the first radial guide groove.

The positioning guide and the radial sliding piece are arranged to position the radial sliding piece in the central axis direction of the stator and guide the radial sliding piece to move in the radial direction of the stator.

In one or more embodiments, the driving member is a driving bolt, the positioning guide member is provided with a central opening for allowing the driving bolt to pass through, the supporting moving member is provided with a threaded hole, and the driving bolt passes through the central opening of the positioning guide member and is in threaded connection with the threaded hole of the supporting moving member.

According to the test system, the driving piece is arranged to be the driving bolt, the structure of the test system can be simplified, the preparation cost is reduced, the operation of driving and supporting the moving piece is simple and easy to implement, special testing personnel are not needed, the labor is saved, and the test cost is reduced.

In one or more embodiments, the supporting mover is in the shape of a truncated cone that tapers from the bottom to the top.

In one or more embodiments, the body of the radial slide comprises an inner surface, which is conformed to the supporting and moving member, and an outer surface, which is able to conform to the inner wall of the stator.

The radial sliding piece can move outwards along the radial direction of the stator when the supporting moving piece moves from the releasing position to the working position, and the radial force applied to the radial sliding piece by the supporting moving piece is utilized to increase the friction force between the radial sliding piece and the inner wall of the stator, so that the radial sliding piece can be fixed on the inner wall of the stator, and the torque can be applied to the stator subsequently.

In one or more embodiments, the outer surface is provided with a texture.

This disclosure can further increase the frictional force between radial sliding piece and the stator inner wall through set up the texture at the surface of radial sliding piece's main part to can make radial sliding piece firmly install on the inner wall of stator when exerting the moment of torsion to test fixture, avoid the relative slip between the two.

In one or more embodiments, the test fixture further comprises a power receiving device, the power receiving device comprises a power receiving body and a plurality of connecting pieces for connecting the power receiving body to the plurality of radial sliding pieces, the power receiving body comprises a plurality of second radial guide grooves, and the plurality of connecting pieces penetrate through the corresponding second radial guide grooves.

This is disclosed through the above-mentioned setting of power receiving arrangement, makes the test fixture be convenient for receive the moment of torsion exerted, and does not hinder radial slider's radial movement.

In one or more embodiments, the power receiving body is disk-shaped and has a polygonal boss provided thereon.

This disclosure can receive the moment of torsion that applies to the test fixture more conveniently through set up polygon boss on power receiving arrangement.

In one or more embodiments, the test system further comprises a power input device capable of driving the power receiving body to rotate.

In one or more embodiments, the test system further comprises an output device capable of sensing displacement of the stator relative to the stator housing.

In one or more embodiments, the output device is a dial indicator.

This is disclosed through setting up output device, can sense the minute displacement of stator relative to stator housing that naked eye can't perceive, promotes test system's measurement sensitivity.

Drawings

Fig. 1 is a perspective view of a stator housing secured to a housing fixture of a test system according to one embodiment of the present disclosure;

FIG. 2 is a perspective view of a test fixture of the test system secured in a stator according to one embodiment of the present disclosure;

FIG. 3 is a perspective view of a test fixture according to one embodiment of the present disclosure;

FIG. 4 is an exploded view of a test fixture according to one embodiment of the present disclosure;

FIG. 5 isbase:Sub>A cross-sectional view taken along section line A-A of FIG. 3;

fig. 6 is an exploded view of a positioning guide in a test tool according to an embodiment of the present disclosure.

Detailed Description

Embodiments of the present disclosure are described below with reference to specific embodiments, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure herein.

It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, which is to be given the full breadth of the present disclosure, but rather the scope of the present disclosure should not be limited by any of the above-described exemplary embodiments.

For convenience of description, the drawings of the present disclosure correspondingly simplify or omit components commonly used in the art, which do not interfere with the understanding of the present disclosure by those skilled in the art.

In response to the deficiencies of the prior art, the present disclosure provides a test system for measuring the loosening torque between a stator 1 and a stator housing 2. Specific embodiments of the present disclosure are described below in detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the testing system according to the present disclosure includes a housing fixing device 3 and a testing tool 4, wherein the housing fixing device 3 may be, for example, a workbench of the testing system, or a base fixed on the workbench, and is mainly used for fixing the stator housing 2 so as to be immovable. The test fixture 4 may be at least partially inserted into a central hole of the stator 1 and fixed to an inner wall of the stator 1, so as to apply a torque to the stator 1 through the test fixture 4 and thereby measure a loosening torque between the stator 1 and the stator housing 2, which will be described in detail below.

Referring now to fig. 3 to 6, the testing tool 4 includes a driving member 10, a supporting moving member 20, a plurality of radial sliding members 30 (six are exemplified by the disclosure, but not limited thereto), and a positioning guide 40. The driving member 10 is connected to the supporting moving member 20 to drive the supporting moving member 20 to move along the direction of the central axis O1 of the stator 1 between a release position and a working position, wherein the working position is a position of the supporting moving member 20 corresponding to the time when the testing tool 4 is fixed on the inner wall of the stator 1 and can apply torque to the inner wall of the stator 1, and the release position is a position of the supporting moving member 20 corresponding to the time when the testing tool 4 can be separated from the inner wall of the stator 1.

In one embodiment, the driving member 10 may be a driving bolt screwed into a threaded hole 21 (as shown in fig. 4) formed on the supporting moving member 20 to be combined with the thread in the threaded hole 21, and when the driving bolt is rotated in the threaded hole 21, the supporting moving member 20 can be driven to reciprocate along the length extension direction of the driving bolt, that is, the rotational motion of the driving bolt can be converted into the linear motion of the moving supporting member 20. The structure of the test system can be simplified, the preparation cost is reduced, the operation of driving the supporting moving part is simple and easy to implement, special testers are not needed, the labor is saved, and the test cost is reduced. Of course, the present disclosure is not limited to the above-described structure of the driver 10 as long as the supporting mover 20 can be driven to move in the direction of the central axis O1 of the stator 1.

Referring to fig. 3 and 4, a plurality of radial sliders 30 are disposed around the supporting moving member 20, and when the supporting moving member 20 moves from the release position to the working position (in the orientation shown in fig. 4, the radial slider 30 moves from the release position to the working position from the bottom to the top), the radial slider 30 can be driven by the supporting moving member 20 and moves outward in the radial direction of the stator 1 to abut against and be fixed on the inner wall of the central hole of the stator 1. When the support mobile 20 moves from the working position to the release position (from the working position to the release position, from the top downwards, in the orientation shown in fig. 4), the radial slider 30 can disengage from the inner wall of the stator 1.

Specifically, as shown in fig. 4 and 5, support runner 20 may be generally in the shape of a truncated cone that tapers from the bottom to the top. The radial slider 30 provided around the support mover 20 includes a main body 31 extending in the direction of the central axis O1 of the stator 1 and a mounting portion 32 extending from the main body 31 toward the central axis O1. The main body 31 has an inner surface 311 facing the support moving member 20 and an outer surface 312 facing the inner wall of the stator 1. The inner surface 311 may be engaged with the supporting moving member 20, whereby, when the supporting moving member 20 moves from the release position to the working position in the direction of the central axis O1, since the inner surface 311 of the main body 31 of the radial slider 30 is engaged with the supporting moving member 20 in the truncated cone shape, the upward movement of the supporting moving member 20 causes the plurality of radial sliders 30 to move outward in the radial direction, i.e., to expand outward, and when the supporting moving member 20 drives the radial sliders 30 to move radially outward to contact the inner wall of the stator 1, the driving member 10 may be continuously rotated, so that the supporting moving member 20 continues to apply a radial force to the radial sliders 30 and the radial sliders 30 are firmly fixed on the inner wall of the stator 1 by a frictional force between the outer surface 312 of the radial slider 30 and the inner wall of the stator 1. When the support moving member 20 moves from the working position to the release position, the support moving member 20 moves downward to be disengaged from the inner surface 311 of the radial sliding member 30, and no radial force is applied to the radial sliding member 30, so that the friction force between the outer surface 312 of the radial sliding member 30 and the inner wall of the stator 1 can be reduced, the radial sliding member 30 can be disengaged from the inner wall of the stator 1, and the test tool 4 can be moved out of the central hole of the stator 1.

Of course, the present disclosure is not limited to the above-mentioned shape of supporting runner 20, for example, supporting runner 20 may also be frustum of pyramid or other suitable shape as long as it moves from the release position toward the working position to move radial slide 30 radially outward.

In a preferred embodiment, the outer surface 312 of the main body 31 of the radial sliding member 30 may be provided with texture for further increasing the friction force between the radial sliding member 30 and the inner wall of the stator 1, so that the radial sliding member 30 can be firmly mounted on the inner wall of the stator 1 when the torque is applied to the test fixture 4, and the relative sliding between the two is avoided.

With continued reference to fig. 3 and 4, the relative arrangement of the radial slide 30 will be described. The mounting portion 32 of the radial slider 30 is slidably connected to the positioning guide 40 in the radial direction of the stator 1. That is, the positioning guide 40 can position the radial slide 30 in the direction of the center axis O1 of the stator 1, i.e., both are not relatively movable in the axial direction, and guide the radial slide 30 to move in the radial direction of the stator 1.

Specifically, as shown in fig. 4 and 6, the positioning guide 40 may be generally in the shape of a circular disk or rudder as shown. The positioning guide 40 includes a plurality of receiving grooves 41 that are open radially outward and that receive the mounting portion 32, a plurality of positioning through-holes 42 that penetrate the respective receiving grooves 41, and a plurality of positioning pins 43 that are mountable in the respective positioning through-holes 42. The mounting portion 32 of the radial slider 30 may have, for example, a substantially fan-shaped shape, and may be inserted into the receiving groove 41 in the radial direction from the outside of the positioning guide 40 such that a first radial guide groove 321 provided on the mounting portion 32 and extending in the radial direction of the stator 1 corresponds to the positioning through hole 42, and the positioning pin 43 is inserted into the positioning through hole 42 and the first radial guide groove 321 to slidably connect the two. Of course, the disclosure is not limited to the above structure, for example, the first radial guide groove 321 provided on the mounting portion 32 may also exchange positions with the positioning through hole 42 correspondingly provided on the positioning guide 40, that is, the mounting portion 32 is provided with the positioning through hole 42 for mounting the positioning pin 43, the positioning guide 40 is correspondingly provided with the first radial guide groove 321, and the positioning pin 43 is inserted into the positioning through hole 42 and the first radial guide groove 321, so that the positioning guide 40 and the radial sliding member 30 can be slidably connected in the radial direction.

As shown in fig. 5-6, the positioning guide 40 further includes a central opening 44. The diameter of the central opening 44 is larger than the diameter of the shank of the driving bolt 10 and smaller than the size of the bolt head of the driving bolt 40, so that the shank of the driving bolt 10 can pass through the central opening 44 and be screwed to the supporting runner 20, and the bolt head is located at the other side of the positioning guide 40 relative to the supporting runner 20, which facilitates the tester to rotate the bolt head of the driving bolt 10 to drive the supporting runner 20 to move along the central axis O1.

Referring to fig. 2 to 5, the test fixture 4 may further include a power receiving device 50 connected to the radial slide 30 for receiving a torque applied to the test fixture 4 and transmitting the torque to the radial slide 30, wherein the torque is also applied to the stator because a friction force between the radial slide 30 and an inner wall of the stator 1 can make the radial slide 30 and the stator integral. Specifically, the power receiving device 50 may include a power receiving body 51 and a plurality of connecting members 52. The power receiving body 51 may have a substantially disk shape and include a plurality of second radial guide grooves 511 extending in a radial direction thereof, and a plurality of connecting members 52 respectively pass through the corresponding second radial guide grooves 511 and are connected to the radial slide member 30 so that they can be slidably connected in the radial direction without interfering with the radial movement of the radial slide member 30. In one embodiment, the connecting member 52 may be connected to the main body 31 of the radial slider 30 to avoid the possibility of connecting to the mounting portion 32 and causing the mounting portion 32 to distort while transmitting torque. The power receiving body 51 may be further provided with a polygonal boss 512 (for example, a hexagonal boss, but the disclosure is not limited thereto) at a side opposite to the supporting mover 20 so as to receive the torque applied to the test fixture 4 through the polygonal boss 512.

As shown in fig. 4, the connecting member 52 may include a stud 521 and a nut 522, and one end of the stud 521 is threadedly coupled to the radial slider 30 and the other end is coupled to the nut 522 located at the other side of the power receiving body 51 through the second radial guide groove 511. Of course, the present disclosure is not limited to the above-described structure of the link 52 as long as the power receiving body 51 can be connected to the radial slide 30.

In addition, the test system includes a power input device (not shown). The power input device is used in cooperation with the power receiving device 50 of the test fixture 4, and particularly, in cooperation with the polygonal boss 512 arranged on the power input device, so as to provide torque for the test fixture 4. In one embodiment, the power input device may be, for example, a torque wrench, and the torque wrench is provided with a digital panel for displaying the torque applied by the torque wrench, so that the configuration can reduce the manufacturing cost of the test system, and the test system has no specific requirements for the test environment and the test personnel (i.e., no special test personnel and no special laboratory are needed), thereby reducing the test cost. However, the present disclosure is not limited thereto, and for example, the power input device may be an automatic input device, and the torque applied to the test fixture 4 by the automatic input device is controlled by the control system.

In a preferred embodiment, the testing system of the present disclosure may further include an output device (not shown in the drawings) to sense and display a small displacement of the stator 1 relative to the stator housing 2, so as to improve the measurement sensitivity of the testing system. The output device may be, for example, a dial indicator fixed on the stator housing 2, and correspondingly, a displacement transmission member may be connected to the stator 1, so that the displacement transmission member is located at a measurement head of the dial indicator and/or contacts the measurement head, when the stator 1 rotates relative to the stator housing 2, a pointer of the dial indicator moves, thereby sensing a minute displacement of the stator 1 relative to the stator housing 2 that cannot be detected by naked eyes, and knowing a loosening torque between the stator 1 and the stator housing 2 through the power input device. Of course, the present disclosure is not limited to the above-described structure of the output device, and for example, the output device may be a sensor as long as it can sense a minute displacement of the stator 1 with respect to the stator housing 2.

When the test system provided by the present disclosure is used to measure the loosening torque between the stator 1 and the stator housing 2, firstly, the stator housing 2 of the motor is fixed on the housing fixing device 3, the supporting moving member 20 and the radial sliding member 30 of the test fixture 4 are inserted into the central hole of the stator 1, the supporting moving member 20 is driven by rotating the driving member 10 of the test fixture 4 to move from the release position to the working position along the direction of the central axis O1, and in this process, the radial sliding member 30 can move outwards along the radial direction of the stator in a linkage manner until the radial sliding member is firmly fixed on the inner wall of the stator 1; subsequently, the power receiving body 51 is mounted to the radial slide 30 through the connecting member 52; and then gradually applying torque to the testing tool 4 through the power input device until the stator 1 rotates relative to the stator shell 2, and recording a torque value displayed by the power input device at the moment, namely the loosening torque between the stator 1 and the stator shell 2 of the motor. Whether the fit between the stator and the shell is qualified or not can be judged by comparing the loosening torque with the maximum torque borne by the rotor in the motor calibration parameters subsequently, so that a designer can be helped to determine reasonable fit tolerance between the stator and the shell.

Of course, the present disclosure may also mount the power receiving body 51 on the radial sliding member 30, insert the radial sliding member 30 into the central hole of the stator 1, rotate the driving member 10 from the side of the testing tool 4 to fix the radial sliding member 30 on the inner wall of the stator 1, and then apply the torque and measure the loosening torque between the stator 1 and the stator housing 2 in the same manner as described above.

The testing tool disclosed by the invention can be suitable for testing requirements of motors of different models and sizes. Specifically, since the radial slide 30 is movable in the radial direction of the stator 1, the test system can measure the loosening torque between the stator and its stator housing over a range of dimensions. Furthermore, when the size of the inner diameter of the stator 1 is outside the above range, since the radial slide 30 is removable, the measurement of the loosening torque between a stator of different inner diameter and its stator housing can be satisfied by replacing the radial slide 30, for example, with a radial slide 30 having a greater or smaller radial thickness, without modifying other parts of the test system. Of course, the testing system of the present disclosure may also achieve the above-described objectives by replacing differently sized supporting movers 20. Therefore, the testing system provided by the disclosure can be suitable for the motor stator with a larger size range under the condition of repeatedly using most parts, and a new testing system does not need to be designed and manufactured, so that the application flexibility of the testing system is effectively improved, and the testing cost is greatly saved.

The utility model provides a test system for measuring not hard up moment of torsion between stator and the stator casing, through the concrete structural design of test fixture among the test system, can be under the condition that does not use the binder, fix test fixture on the inner wall of stator to exert the moment of torsion to the stator and in order to carry out above-mentioned measurement, so can avoid causing the damage to the test sample, make its reuse, reduce the wasting of resources. Moreover, the design that the radial sliding piece can move in the radial direction of the stator enables the testing system to measure the loosening torque between the stator and the stator shell within a certain size range, and even if the inner diameter size of the stator exceeds the range, the testing system can achieve the measuring function by replacing other parts, for example, replacing supporting moving pieces with different sizes. In addition, the test system provided by the application is adopted to carry out the measurement, the measurement can be completed only by rotating the driving piece by a tester and controlling the power input device to apply torque, the test is simple and easy to implement, no special requirements are required on the test environment and the tester, and the test cost is reduced.

Claims (12)

1. A test system for measuring the loosening torque between a stator (1) and a stator housing (2), characterized in that the test system comprises:

a housing fixing device (3) for fixing the stator housing (2); and

a test fixture (4) at least partially inserted in a central hole of the stator (1), the test fixture (4) comprising:

a driver (10);

a support moving member (20) driven by the driving member (10) to move between a release position and a working position in a central axis direction of the stator (1); and

a plurality of radial sliders (30) disposed around the supporting mover (20), the radial sliders (30) being driven by the supporting mover (20) and moving outward in a radial direction of the stator (1) to abut against an inner wall of a center hole of the stator (1) when the supporting mover (20) moves from the release position to the working position.

2. The testing system according to claim 1, wherein the radial slide (30) comprises a main body (31) extending in a direction of a central axis of the stator (1) and a mounting portion (32) extending from the main body (31) towards the central axis,

the test tool further comprises a positioning guide (40), and the positioning guide (40) is connected with the mounting portion (32) of the radial sliding piece (30) in a sliding mode along the radial direction.

3. The testing system according to claim 2, wherein the positioning guide (40) comprises a plurality of receiving grooves (41) which are radially outwardly open and receive the mounting portion (32) and a plurality of positioning through holes (42), the mounting portion (32) of the radial slider (30) being provided with a first radial guide groove (321), wherein the positioning guide (40) further comprises a positioning pin (43) which is pierced in the positioning through hole (42) and the first radial guide groove (321).

4. The test system according to claim 3, wherein the driving member (10) is a driving bolt, the positioning guide (40) is provided with a central opening (44) allowing the driving bolt to pass through, the supporting moving member (20) is provided with a threaded hole (21), and the driving bolt passes through the central opening (44) of the positioning guide (40) and is threaded into the threaded hole (21) of the supporting moving member (20).

5. The test system according to claim 1, characterized in that said supporting runner (20) is frustoconical, tapering from bottom to top.

6. The testing system according to claim 1, characterized in that the body (31) of the radial slider (30) comprises an inner surface (311) and an outer surface (312), the inner surface (311) being conformed to the supporting runner (20), the outer surface (312) being able to conform to the inner wall of the stator (1).

7. The testing system of claim 6, wherein the outer surface (312) is provided with a texture.

8. The testing system according to claim 1, wherein the testing tool (4) further comprises a power receiving device (50), the power receiving device (50) comprising a power receiving body (51) and a plurality of connecting members (52) connecting the power receiving body (51) to the plurality of radial slides (30), the power receiving body (51) comprising a plurality of second radial guide slots (511), the plurality of connecting members (52) passing through the corresponding second radial guide slots (511).

9. The test system according to claim 8, wherein the power receiving body (51) is disk-shaped and provided with a polygonal boss (512) thereon.

10. The test system according to claim 9, further comprising a power input device capable of driving the power receiving body (51) to rotate.

11. The test system according to claim 1, further comprising an output device capable of sensing a displacement of the stator (1) relative to the stator housing (2).

12. The test system of claim 11, wherein the output device is a dial gauge.

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